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标题: 安规申请中的一些典型问题 [打印本页]
作者: lucky    时间: 2007-9-1 14:06
标题: 安规申请中的一些典型问题
好久不来，变化巨大啊，发个贴先！$ i0 V" N. m! [" C

) b; L8 `+ X" c! @; x& J. v1、标志不当：
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  a.fuse marking
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  b.power switch symbol
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  c.protective earth symbol
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' N+ F" r* h  x8 s1 P( Y/ R9 g  d.PE wire color
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2.安全说明：2 p' w9 {$ |  w% ~4 C0 @

+ L# H; t( ~2 ~6 K  a.Motltipower supply system
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2 U5 P2 b$ {$ T) S0 G9 D8 B6 R  b.protective earth connection instruction
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( @. m& C% y! V1 q  c.High touch current warning label+ I. p( {/ d8 q+ T% C

5 ^0 Q% B5 S$ G9 j: u9 Q  d.Hazardous voltage* B/ B/ `" X1 f0 g

# g: }& P+ f- d& A* B  p3.绝缘距离：
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  a.10N force requirement for all parts & l* R* L5 X' z* _6 I) I) Q

! i/ @$ W3 V; t  b.misunderstand bulk capacitor's insulation specifications$ C; ?0 l$ [# K& a+ a1 {

- z9 C0 m0 |+ v) }1 W  c.Ill assembly
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  d.misunderstand fan wire's insulation feature   
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  e.transformer construction fail: margin tape width and turns of insulation tape" x6 g' C) B$ w4 @. n9 W( c, K
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4.资料和元器件：
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% S2 b" K: n2 Z# z3 B  a.certificate out of validity. h+ b' V1 v. O5 t# L/ t/ U
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  b.misuse component certificate: UL and European standards different
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$ t* ^* b$ ^5 s  c.miss safety critical components in CDF: discharge resistors and bulk capacitor
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  k7 ~4 s$ t* {! H; z  d.misunderstand the requirements for safety critical components: not all safety critical components need certificate
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7 x6 @* |- V4 }. E% K. k* [+ X, L  E  e.misunderstand components
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. N/ _- o6 F$ l/ G5 k2 K. B5.安规测试:
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2 f$ X9 S1 y! Y# G  a.Hi-pot fail, especially after 48hours' humidity treatment7 P, }2 O  ]5 q& d6 q
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  b.Touch current fail) ?1 R( }9 a. a! @5 {
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  c.Output overload fail: temp. exceeded safety limit0 U% u4 ~$ U) O( L( G

! {; M  F- _6 c. J# N  d.Component fault simulation: temp.on transformer and output voltage exceeded safety limit/ e3 Y, r9 Y' q0 G4 w$ G0 i
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6.设计更改和生产一致性:
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0 u1 z& P: M/ P1 Q" V. wa.     Non-conformance between certification and production8 Z; \  e! g8 ]3 {) }

# j+ a5 M6 F  I2 Hb.     Label format + U" K9 E: t; a4 N5 w

. @0 f, K3 p0 {, W/ w) v, C# B* Q7.PCB Layout图提供不对，只提供了器件装配图，没有走线图。



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